1 doctor weighed in:

How long after being exposed to the flu will symptoms start to appear?

1 doctor weighed in
Dr. Ralph Morgan Lewis
Family Medicine

In brief: See below

Incubation period for influenza a & b averages 2 days (range 1-4 days).
Avian flu (h5n1) incubation depends upon whether exposed to infected bird (less than 7 days) or to infected human (generally 3-5 days). Immunization with influenza vaccine &/or h5n1 vaccine is best preventive if you work in or travel to areas of high exposure risk.

In brief: See below

Incubation period for influenza a & b averages 2 days (range 1-4 days).
Avian flu (h5n1) incubation depends upon whether exposed to infected bird (less than 7 days) or to infected human (generally 3-5 days). Immunization with influenza vaccine &/or h5n1 vaccine is best preventive if you work in or travel to areas of high exposure risk.
Dr. Ralph Morgan Lewis
Dr. Ralph Morgan Lewis
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